A nicely made cap badge... I will assume cap badge due to it's size..... tip to tip on the wings is 82 mm.
Maker marked McKenzie & Clay Winnipeg... A maker I had not encountered before.
#6 EFTS was Commonwealth flight training school. It was opened in July of 1940 and closed November of 1944.... during much of 1941 and 1942 it doubled as the #6 Air Observer School...
Jack
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"We must make our mistakes quickly"
Major General George Alan Vasey CB, CBE, DSO and Bar
New Guinea 1942